Determination of Metals in Natural Waters by Inductively Coupled Plasma Optical Emission Spectroscopy after Preconcentration on Silica Sequentially Coated with Layers of Polyhexamethylene Guanidinium and Sulphonated Nitrosonaphthols

<p>Adsorption capacity of Cu(II), Ni(II), Fe(III), and Co(II) on SiO<sub>2</sub>-PHMG-NRS<i> (a)</i> and SiO<sub>2</sub>-PHMG-NNS<i> (b). </i>Mass of adsorbent-0.1 g, sample volume 10 mL, and shaking time 10 min.</p>

International Journal of Analytical Chemistry

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Figure 7

Figure 7: Determination of Metals in Natural Waters by Inductively Coupled Plasma Optical Emission Spectroscopy after Preconcentration on Silica Sequentially Coated with Layers of Polyhexamethylene Guanidinium and Sulphonated Nitrosonaphthols 

Figure 7 | Determination of Metals in Natural Waters by Inductively Coupled Plasma Optical Emission Spectroscopy after Preconcentration on Silica Sequentially Coated with Layers of Polyhexamethylene Guanidinium and Sulphonated Nitrosonaphthols 